package day11;

import java.sql.CallableStatement;
import java.util.*;

/**
 * @author tongchen
 * @create 2023-03-16 22:50
 */
public class Test01 {
    public static void main(String[] args) {
        String str="ssss";
        change(str);
        System.out.println(str);
        HashMap hashtable = new HashMap();
        hashtable.put("name", null);
        hashtable.put("name", "jo");
        System.out.println(hashtable.size());

    }

    private static void change(String str) {
        str="okok";

    }
}
